Technology history for 21.co.uk
Stack size over time
From 6 detected technologies in Jun 2018 to 31 in Jun 2026 (peak 33).
Currently detected
- Google Analytics since Jun 2018
- Google Tag Manager since Jun 2018
- jQuery since Jun 2018
- Nginx since Oct 2018
- Google Cloud since Jan 2020
- Imperva since Mar 2021
- Cloudflare since Sep 2021
- core-js since Sep 2021
- Amazon ALB since Sep 2021
- Amazon Web Services since Sep 2021
- Ruby since Sep 2021
- Moment.js since Sep 2021
- React since Sep 2021
- Ruby on Rails since Sep 2021
- Webpack since Sep 2021
- Zendesk since Sep 2021
- Cloudflare Bot Management since Dec 2021
- Envoy since Dec 2021
- Gatsby since Feb 2022
- Cloudflare Network Error Logging since Feb 2022
- Netlify since Feb 2022
- Google Cloud CDN since Apr 2022
- Google Workspace since Aug 2022
- PWA since Aug 2022
- HSTS since Sep 2022
- Emotion since Mar 2024
- Datadog since Mar 2024
- Node.js since Mar 2024
- MUI since Mar 2024
- Next.js since Mar 2024
- Open Graph since Jun 2025
Previously used
- HTTP/3 Sep 2022 to Jan 2026 · 3 yrs
- Priority Hints Jun 2025 to Jul 2025 · 1 mo
- PayPal Mar 2024 to Mar 2024 · 1 mo
- Adform Feb 2022 to Feb 2024 · 2 yrs
- Facebook Pixel Jul 2021 to Feb 2024 · 2 yrs
- Google Optimize Feb 2021 to Feb 2024 · 3 yrs
- Hotjar Jun 2018 to Feb 2024 · 5 yrs
- C Feb 2023 to Feb 2023 · 1 mo
- Facebook May 2021 to Apr 2022 · 11 mo
- FingerprintJS Jun 2018 to Apr 2022 · 3 yrs
- Tailwind CSS Apr 2022 to Apr 2022 · 1 mo
- Google Font API Sep 2021 to Jan 2022 · 4 mo
- Wheelio Sep 2021 to Oct 2021 · 1 mo
- Hammer.js Oct 2018 to Aug 2021 · 2 yrs
- AppNexus Jun 2018 to Apr 2020 · 1 yr
- Zendesk Chat Oct 2018 to Dec 2018 · 2 mo
Timeline
2026 1 dropped
- dropped HTTP/3 Mar 2026 · Miscellaneous
2025 2 added · 1 dropped
- dropped Priority Hints Sep 2025 · Performance
- added Open Graph Jun 2025 · Miscellaneous
- added Priority Hints Jun 2025 · Performance
2024 6 added · 5 dropped
- dropped PayPal Sep 2024 · Payment processors
- dropped Adform Jun 2024 · Advertising
- dropped Facebook Pixel Jun 2024 · Analytics
- dropped Google Optimize Jun 2024 · A/B Testing
- dropped Hotjar Jun 2024 · Analytics
- added Datadog Mar 2024 · RUM
- added Emotion Mar 2024 · JavaScript frameworks
- added MUI Mar 2024 · UI frameworks
- added Next.js Mar 2024 · JavaScript frameworks
- added Node.js Mar 2024 · Programming languages
- added PayPal Mar 2024 · Payment processors
2023 1 added · 1 dropped
2022 8 added · 5 dropped
- added HSTS Sep 2022 · Security
- added HTTP/3 Sep 2022 · Miscellaneous
- added Google Workspace Aug 2022 · Webmail
- added PWA Aug 2022 · Miscellaneous
- dropped Facebook Jun 2022 · Widgets
- dropped FingerprintJS Jun 2022 · JavaScript libraries
- dropped Tailwind CSS Jun 2022 · UI frameworks
- added Google Cloud CDN Apr 2022 · CDN
- added Tailwind CSS Apr 2022 · UI frameworks
- dropped Google Font API Mar 2022 · Font scripts
- added Adform Feb 2022 · Advertising
- added Cloudflare Network Error Logging Feb 2022 · Issue trackers
- dropped Wheelio Jan 2022 · Widgets
2021 9 added · 3 dropped
- dropped Hammer.js Oct 2021 · JavaScript libraries
- dropped Hotjar Oct 2021 · Analytics
- added core-js Sep 2021 · JavaScript libraries
- added FingerprintJS Sep 2021 · JavaScript libraries
- added Google Font API Sep 2021 · Font scripts
- added Wheelio Sep 2021 · Widgets
- added Facebook Pixel Jul 2021 · Analytics
- added Hammer.js Jul 2021 · JavaScript libraries
- added Facebook May 2021 · Widgets
- dropped Hammer.js Mar 2021 · JavaScript libraries
- added Imperva Mar 2021 · Security
- added Google Optimize Feb 2021 · A/B Testing
2020 1 added · 1 dropped
- dropped AppNexus Jun 2020 · Advertising Networks
- added Google Cloud Jan 2020 · CDN
2019 6 added · 1 dropped
- added AppNexus Mar 2019 · Advertising Networks
- added Google Analytics Mar 2019 · Analytics
- added Google Tag Manager Mar 2019 · Tag Managers
- added Hammer.js Mar 2019 · JavaScript Libraries
- added Hotjar Mar 2019 · Analytics
- added Nginx Mar 2019 · Web Servers
- dropped Zendesk Chat Feb 2019 · Live Chat
2018 3 added · 2 dropped
- dropped FingerprintJS Nov 2018 · JavaScript Libraries
- dropped jQuery Nov 2018 · JavaScript Libraries
- added Hammer.js Oct 2018 · JavaScript Libraries
- added Nginx Oct 2018 · Web Servers
- added Zendesk Chat Oct 2018 · Live Chat